The supporting details that support the central idea of the paragraph are:
- "After the Civil War and the emancipation of slaves in the United States, the Fifteenth Amendment, which would give African American men the right to vote, was proposed. This caused a great divide between women suffragists."
- "Some women, including Stanton and Anthony, would not support the amendment because they felt that it should extend voting rights to all American citizens."
- "Other women, including Lucy Stone and Julia Ward Howe, supported the amendment."
- "They believed that once African American men had the vote, women would be next."
All of these details contribute to the central idea by illustrating the differing perspectives among women's suffragists regarding the Fifteenth Amendment and its implications for voting rights.